Tektronix 070-8462-03, Инструкция по эксплуатации

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Adjustment Procedure
1735 HD High Definition Waveform Monitor
6–17
n. Return 1735 HD to X1 Gain.
21. Check PIX MON OUT Frequency Response
a. Connect the peak-to-peak detector head to the 1735 HD PIX MON OUT
connector.
b. Connect the leveled sine wave generator to the 1735 HD CH 1A.
Terminate the loop-through in 75
W
.
c. Select CH 1A INPUT on the 1735 HD.
d. Set the leveled sine wave generator Frequency Range to 50 kHz and
adjust its Output Amplitude for a 700mV display on the 1735 HD.
e. Set the DVM range for three-place accuracy and adjust the peak-to-peak
detector level for a reading as close to zero as possible. Note the
reference reading.
f. Use the leveled sine wave generator frequency controls to provide all
frequencies from 250 kHz to 30 MHz.
g. Check that display voltage on the DVM is equal to that noted at 50 kHz,
±
5% (35 mV).
h. Disconnect all cables and 75
W
terminators from the 1735 HD.
22. Adjust CH 1B Subtract
a. Connect the TSG 1001 G/Y Output to the CH 1B INPUT and terminate
the loop-through in 75
W
.
b. Enter the 1735 HD MENU. Select SUBTRACT, then YES. Exit the
MENU.
c. Select CH 1B INPUT, CH 1 REF, and X5 Gain.
d. Select Zone Plate Signal Set and Flat Field on the TSG 1001. Adjust the
horizontal sine wave frequency for 30 MHz sweep.
e. Adjust A3R383 (Inv1B Gain) and A3C144 (CH 1 Response) for the best
null of the sweeps as displayed on the 1735 HD.
f. Select X1 Gain on the 1735 HD.
23. Check CH 1B Subtract
a. Connect the output cable from the leveled sine wave generator, through a
50
W
precision cable, a 50-to-75
W
minimum loss attenuator, a 75
W
in-line terminator and dual-input connector, to the 1735 HD CH 1A and
CH 1B INPUTs.